Physics – Quantum Physics
Scientific paper
2005-04-06
Physics
Quantum Physics
12 pages, LaTeX
Scientific paper
A density operator of a bipartite quantum system is called robustly separable if it has a neighborhood of separable operators. Given a bipartite density matrix, its property to be robustly separable is reduced, using the continuous ensemble method, to a finite number of numerical equations. The solution of this system exists for any robustly separable density operator and provides its representation by a continuous mixture of pure product states.
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